People with Down syndrome have an extra chromosome that impacts their looks and their ability to think, learn, and reason. Discover the type, causes, and kinds of effects it can have.

According to the Centers for Disease Control, each year about 6,000 babies are born with Down syndrome, making it the most common chromosomal disorder. That's about 1 in every 700 newborns.

That pregnancy took a dramatic turn, however, when the couple was told that their baby had a 100 percent chance of being born with Down syndrome. Kirstin Czernek and Aria. TikTok/kirstinczernek ...

Down syndrome occurs when a baby develops an extra copy of the 21st chromosome during pregnancy, resulting in telltale symptoms. These distinctive signs and symptoms can include recognizable ...

About 5,700 babies are born with Down syndrome each year in the U.S., and over 400,000 people in the country currently live with it, according to the Centers for Disease Control and Prevention (CDC).

Mosaic Down syndrome is a rare, less severe form of Down syndrome. We explain the condition, its cause, symptoms, and how to diagnose it.

Symptoms of Down syndrome vary from one person to another. In some individuals, the physical symptoms and intellectual problems might be severe, yet in others not too severe.

Down syndrome is the most common chromosome-related genetic condition in the United States. It’s when there is an extra copy of chromosome 21 and can result in physical symptoms as well as ...